surf south from mossdeep you see a ring of rocks dive under and voila
under sootopolis
in sootopolis city
sootopolis city
underwater near sootopolis city
well i forgot
Go to Sootopolis.
The Pokemon league!
Sootopolis city.
simpliy the dark spot leading to sootopolis you have to use dive
You have to catch Kyogre and Groudon.
It's in the Cave of Origin in Sootopolis city.
sootopolis city